fix(build): Update AWS Lambda layer wheel name for py3-only wheel

Removing `bdist_wheel universal=1` from `setup.py` changed the produced
wheel filename from `sentry_sdk-<ver>-py2.py3-none-any.whl` to
`sentry_sdk-<ver>-py3-none-any.whl`. Update the hardcoded wheel path in
`scripts/build_aws_lambda_layer.py` to match.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: ericapisani

scripts/build_aws_lambda_layer.py

@@ -49,7 +49,7 @@ def install_python_packages(self) -> None:
 
         sentry_python_sdk = os.path.join(
             DIST_PATH,
-            f"sentry_sdk-{SDK_VERSION}-py2.py3-none-any.whl",  # this is generated by "make dist" that is called by "make aws-lambda-layer"
+            f"sentry_sdk-{SDK_VERSION}-py3-none-any.whl",  # this is generated by "make dist" that is called by "make aws-lambda-layer"
         )
         subprocess.run(
             [